fix(web-next): support USE_DEV_SEED=false and load root .env globally

- Add USE_DEV_SEED=false branch to bindAll dispatcher
- Use dotenv-cli to inject root .env into all Turbo tasks
- Add globalDependencies for .env cache invalidation

turbo.json

@@ -1,5 +1,6 @@
 {
   "$schema": "https://turborepo.dev/schema.json",
+  "globalDependencies": [".env"],
   "globalEnv": [
     "CI",
     "DATABASE_URL",